[wwwdocs] C++ preprocessor changes in 4.3

[Manuel López-Ibáñez]

Hi,

The following documents the changes to the C++ preprocessor.

OK to commit?

Manuel.
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      <li>The <code>-fforce-mem</code> option has been removed
      because it had no effect in the last few GCC releases.</li>
+ 
+     <li>C++ preprocessor emits errors by default for certain
+     nonconformant code and for <code>-pedantic</code>, following the
+     default behaviour of the C++ front-end. As a result, some
+     warnings, such as "no newline at end of file", are now hard
+     errors.  The <code>-fpermissive</code> option can be used to
+     downgrade these diagnostics from errors to warnings.</li>
+ 
    </ul>
  
  <h2>General Optimizer Improvements</h2>